Did you figure this out? You're probably best to go with Mahle or Mann filters. I believe they are OEM suppliers or equivalent. Is there no sticker anywhere in the engine bay that has the suggested oil? I had a sticker that was for Castrol TWS 10w60 which is the same as what is recommended for M-cars. I'm not sure if the B3 is the same, but its likely either that or the Castrol for European cars. I can't remember if that's a 0w40 or something like that. I guess I could look it up, but I'm too lazy right now